Stub entry: single definition derived from the GDPR; sector-specific readings not yet documented — contributions welcome.
any operation or set of operations which is performed on personal data or on sets of personal data, whether or not by automated means, such as collection, recording, organisation, structuring, storage, adaptation or alteration, retrieval, consultation, use, disclosure by transmission, dissemination or otherwise making available, alignment or combination, restriction, erasure or destruction
Regulation (EU) 2016/679 (GDPR), Art. 4(2)